SU733839A1 - Hammer pneumohydraulic drive - Google Patents

Description

(54) PNEUMATIC HYDRAULIC DRIVE OF MILK

I

The invention relates to the field of metal forming and can be used in high-speed hammers for forging products from hard metals and alloys.

Known pneumohydraulic drive high-speed hammer containing placed in the frame of the gas chamber, the woman with the rod placed in the gas chamber, pneumohydraulic cylinder mounted on the lid of the gas chamber, the rod of the pneumatic cylinder enters the cavity made in the rod of the woman 1.

The disadvantage of the known drive is low reliability of operation due to the possibility of spontaneous breakdown of the women.

In order to ensure safety of operation, the actuator is equipped with a device for fixing the female in the upper position, placed in the bore of the female rod and made in the form of locking crumbs fixed by means of a hose on the gas chamber lid, and a conical tip mounted on the rod of the pneumohydraulic cylinder,

the end portion of the bore in the rod of the women is made conical with an angle of taper equal to the angle of the taper of the tip.

FIG. 1 shows a hammer drive, a cut; in fig. 2 — node 1 in FIG. one; in fig. 3 is a section along the line A-A in FIG. 2 ..

The pneumatichydraulic drive is placed in the movable frame 1 mounted on shock absorbers .2 on the bed 3 and contains a gas chamber 10 that is mounted in the upper part of the frame, which includes the cylinder 5 with a seal 6. On the gas chamber lid a pneumohydraulic cylinder 7 with a piston 8 is mounted the rod 9 which enters the cavity 10 of the bore, made in the rod

15 women 5. To the cover of the gas chamber by means of a spring 11 fixed locking crumbs 12, interacting with a conical tip 13 mounted on the rod 9. The end section 14 pacTOifKH in the rod of the woman

20 is tapered with a taper angle equal to the taper angle of the tip 13. The pneumatic cavity 15 of the pneumatic-hydraulic cylinder 7 is connected to the bore cavity 10 by means of an opening 16. The hydraulic cavity 17 is connected to a pressure source (not shown). The crackers 12 are able to rotate freely on the lower turn of the spring, their number is determined by calculation. The lift 5 is reset to its initial position by hydraulic lifters 18.

The drive operates as follows.

Hydraulic ram 18 is lowered down. Fluid 17 is supplied to the cavity 17 through the distributor from the hydraulic actuator (not shown), the piston 8 with the rod 9 moves downward, compressing the gas in the cavities 15 and 10. When the rod 9 is in the lower position, the crackers 12 are rotated and set vertically . At the same time, the baba 5 is moved downward by the action of the compressed gas in the cavity 15 to the piston of the rod of the baba 5, the piston of the rod of the baba 5 leaves the cylindrical groove of the gas chamber cover. Baba 5 is accelerated by gas under pressure, which is in the cavity of the gas chamber 4. A shock occurs.

After being struck by a woman, 5 hydraulic lifters 18 rises. In the upper position, the piston rod of the women hydraulic lifts 18 rises. In the upper position, the piston of the piston rod enters the cylindrical groove in the lid of the gas chamber 4, the cavity of the gas chamber and the cavity 10 are uncoupled by means of seal 6. The cavity 17 through the distribution (1 screen (not shown) is connected to the drain. The gas in the cavity 15 the piston 8 with the rod 9 rises up, displaces the liquid from the cavity 17. When the piston 8 is raised, the gas in the cavities 15 and 10 expands, the pressure in them decreases to the required (calculated) value to keep the woman 5 by the action of gas in the cavity of the gas chamber 4 annular area n rshn ram rod. Raise to, rod 9 a tapered tip 13 turns crackers 12 by an angle corresponding to the angle of the cone surface. Hammer ready for turning stroke.

In the event of failure of the seal 6 and overflow 1 and gas from the cavity of the gas chamber 4 into the cavity 10, when the hydraulic lifters 18 are lowered, the woman 5 conical surface 14 sits on the crackers 12 and is held in

upper position (fixation of the female). The spring 11 serves as a compensator for small movements of the women 5 and the rod 9 with the breadcrumbs 12 when the women are fixed.

This embodiment of the hammer greatly simplifies its design, increases reliability and improves safety conditions of work on it.

Claims (1)

Invention Formula A pneumatichydron drive of a hammer containing a gas chamber with a rod placed in a frame, on which a hammerhead is fixed, a pneumatichydraulic cylinder mounted on the lid of the gas chamber, while the rod of a pneumatichydraulic cylinder is inserted into a bore made in the rod of a woman, in order to ensure safety of work, it is equipped with a device for fixing the woman in the upper position, placed in the bore of the rod of the woman and made in the form of fixing crackers, fixed by means of springs on the lid AZOV chamber and tapered tip mounted on the rod of the cylinder of fluid under ztom end portion of the bore in the ram rod is conical with a cone angle equal to the angle of taper nakonechnshsa. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 373069, cl. B 21 J 7/24, 197D /five i8 eleven fZ